Self-cleaning superhydrophobic surfaces with underwater superaerophobicity

Jijo Easo George, Vanessa R.M. Rodrigues, Deepak Mathur, Santhosh Chidangil, Sajan D. George

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Nature-inspired engineering of roughness of the surfaces at micro and nano-length scales offers possibilities of tailoring materials for diverse applications including self-cleaning surfaces, droplet transportation, cell adhesion and oil-water separation. Recent efforts have begun to focus on employing femtosecond-long laser pulses to create such dual length scale roughness at the surface of different kinds of materials including metals, semiconductors and polymers. Herein, we report the fabrication of polymer surfaces that exhibit simultaneous superhydrophobicity and underwater superaerophobicity by replicating femtosecond laser fabricated patterns via soft lithography. Further, by tailoring a single parameter-the laser fluence-we demonstrate tunability of material parameters like anisotropy in wetting, contact angle hysteresis, work of adhesion, and droplet (air bubble) splitting (transport) of the replicated structures. We confirm, using micro-Raman spectroscopy and atomic force microscopy, that our laser patterning does not induce any chemical modification on the polymer but only induces physical modifications-changes in surface roughness-are responsible for the observed tailoring capability. We believe that the replication route provides a cost-effective and green approach to fabricate surfaces with superhydrophobicity and underwater superaerophobicity. Such surfaces can have enormous potential applications in microfluidic devices, droplet manipulation, and energy conversion and storage.

Original languageEnglish
Pages (from-to)8-18
Number of pages11
JournalMaterials and Design
Volume100
DOIs
Publication statusPublished - 15-06-2016

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Surface cleaning
Polymers
Surface roughness
Lasers
Cell adhesion
Chemical modification
Ultrashort pulses
Bubbles (in fluids)
Energy conversion
Microfluidics
Energy storage
Lithography
Contact angle
Hysteresis
Wetting
Raman spectroscopy
Laser pulses
Atomic force microscopy
Oils
Anisotropy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

George, Jijo Easo ; Rodrigues, Vanessa R.M. ; Mathur, Deepak ; Chidangil, Santhosh ; George, Sajan D. / Self-cleaning superhydrophobic surfaces with underwater superaerophobicity. In: Materials and Design. 2016 ; Vol. 100. pp. 8-18.
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Self-cleaning superhydrophobic surfaces with underwater superaerophobicity. / George, Jijo Easo; Rodrigues, Vanessa R.M.; Mathur, Deepak; Chidangil, Santhosh; George, Sajan D.

In: Materials and Design, Vol. 100, 15.06.2016, p. 8-18.

Research output: Contribution to journalArticle

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